标题:
两重两参数威布尔分布混合模型的拟合
Fitting of Twofold Mixed Model for Two-Parameter Weibull Distribution
作者:
徐晓岭, 王蓉华, 顾蓓青, 吴生荣
关键字:
威布尔分布, 两重混合模型, 胸腺淋巴瘤, 网状细胞肉瘤, 逆矩估计, 区间估计
Weibull Distribution; Twofold Mixed Model; Thymus Lymphoma; Reticulum Cell Sarcoma; Inverse Moment Estimate; Interval Estimate
期刊名称:
《Statistics and Application》, Vol.1 No.2, 2012-12-28
摘要:
考虑被辐射的老鼠的存活时间的数据，当老鼠死之后，可以经解剖知道其死亡原因，一类原因为胸腺淋巴瘤，另一类原因为网状细胞肉瘤。本文给出在不经解剖的情形下如何将两种原因引起的存活数据进行分离的统计方法，认为这类老鼠存活时间可用两重两参数威布尔分布混合模型来拟合，同时提出了一个优选准则，并得到了参数的逆矩估计和区间估计。计算结果表明本文方法的简便易行。
Considering the data of survival time of raying mice, we can know the reason of death by dissection after the mice died. One reason is thymus lymphoma, and the other is reticulum cell sarcoma. In this paper, we give the statistical method to separate the survival data caused by two reasons without dissection. It is also considered that this kind of mice survival time can be fitted by twofold mixed model of two-parameter Weibull distribution. Besides, the optimum selection criterion is proposed, and the inverse moment estimates and interval estimates of parameters are obtained. The calculated results indicate that the method is simple and feasible.